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Lease liabilities (non-current and current) - Additional information (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Mar. 31, 2024
Disclosure of Non Current and Current Portion of the Lease Liabilities [Line Items]      
Borrowings interest rate 6.308%   2.50%
Increase (decrease) in lease liability € 43,309 € 42,613  
Bottom Of Range [Member]      
Disclosure of Non Current and Current Portion of the Lease Liabilities [Line Items]      
Borrowings interest rate 3.00% 3.00%  
Top of Range [member] | Lease liabilities [member]      
Disclosure of Non Current and Current Portion of the Lease Liabilities [Line Items]      
Borrowings interest rate 12.00% 12.00%